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Northwest Africa 10172
Basic information Name: Northwest Africa 10172
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10172
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 788 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 178 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 17 Jun 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 10172 (NWA 10172)

(Northwest Africa)

Purchased: 2015

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Ali and Mohammed Hmani in April 2015, reportedly from Mauritania.

Physical characteristics: Several identically appearing pieces, 320, 328, and 140 g in several smaller pieces. Irregular exterior. A saw cut reveals a breccia with numerous fragmental feldspathic clasts set in a dark-gray groundmass.

Petrography: (C. Agee, UNM) This meteorite is mixture of a fine-grained cataclastic domains, large fragmental plagioclase and pyroxene crystals, smaller olivine fragments, symplectites, and shock melt veins. Accessory Fe-metal, silica, ilmenite, and chromite were observed.

Geochemistry: (C. Agee and N. Muttik, UNM) olivine Fa36.8±5.3, Fe/Mn=98±5, n=7; pigeonite Fs39.2±12.0Wo13.9±5.1, Fe/Mn=61±5, n=10; augite Fs35.8±16.2Wo36.0±5.1, Fe/Mn=66±9, n=4; plagioclase An93.3±3.7Ab6.1±3.4Or0.5±0.5, n=9; Shock melt (10 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=45.0±1.5, TiO2=0.34±0.14, Al2O3=24.9±6.0, Cr2O3=0.17±0.12, MgO=7.8±3.9, FeO=7.7±4.1, MnO=0.11±0.06, CaO=14.2±2.5, NiO=0.01±0.02, Na2O=0.43±0.14, K2O=0.10±0.02 (all wt%), Fe/Mn=75±17, Mg#=64±5, MgO+FeO=15.6±7.8 (wt%), n=23.

Classification: Lunar (feldspathic breccia)

Specimens: 20.6 g including a probe mount on deposit at UNM; Ali and Mohammed Hmani hold the main mass.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015
Mass (g):788
Pieces:Several
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):36.8±5.3
Ferrosilite (mol%):39.2±12.0, 35.8±16.2
Wollastonite (mol%):13.9±5.1, 36.0±5.1
Classifier:C. Agee, UNM
Type spec mass (g):20.6
Type spec location:UNM
Main mass:Ali and Mohammed Hmani
Comments:Field name OA-7; submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6968 approved meteorites from (Northwest Africa) (plus 2012 unapproved names)

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